Preheat oven to 350, prepare your cookie sheets with parchment paper or Silicone mats.
Put the butter in a small saucepan over a low heat and cook until it starts to bubble and has turned a lovely golden brown color. Take off the heat and set aside to cool to room temperature.
In a large bowl, whisk together the flour, baking powder, baking soda, salt and coffee.
When the butter has cooled, cream it together with the sugars until combined.
Add the egg and vanilla and beat again.
Fold in the dry ingredients, followed by the chocolate chips.
Chill the mixture in the fridge for any time between 30 minutes and 24 hours. I chilled 1 hour for the first batch and 24 for the second.
Using an ice cream scoop or a cookie scoop, place spoonfuls of the dough on the baking sheet and, if desired, scatter a little sea salt on top. (I did not)
Bake for 8-10 minutes until the edges of the cookies just start to turn golden brown and are firm to the touch.
Allow to cool on the baking tray for 10 minutes before transferring to a wire rack. This is important because they continue to cook and get firm, also, they won't fall apart when you try to remove them
Pour a glass of milk or brew a cup of tea and enjoy! Oh, and share with a friend!